Keynote lectures

According to the Cognitive reserve hypothesis, several factors related to mental engagement, such as level of education, type of occupation, leisure activities and social network, appear to affect the risk of developing clinical dementia. The present article provides an overview of the studies that have investigated the effects of mental engagement and cognitive stimulation specifically on dementia of the Alzheimer’s type (AD). Mental training and cognitive stimulation interventions in AD have been shown to be useful in increasing patients’ ability in performing activities of daily living (ADL), allowing them to maintain relative independence. Since cognitive engagement and stimulation are known to modify the brain processes to perform tasks, by recruiting alternative and more efficient networks, this review is especially focused on cognitive rehabilitation in AD patients, which has been shown to improve their global functioning and cognition. This perspective stresses the idea that cognitive reserve is not a fixed factor, but can be continuously modified by life experiences, even when the brain is already affected by neuropathology.     

Une redéfinition des relations entre la personnalité « Ouverte à l’expérience » et l’intelligence

Previous investigations of the relations between the Big Five personality traits and cognitive abilities have consistently supported that higher levels of openness to experience are associated with higher levels of crystallized abilities or knowledge. However, consistent with the idea that crystallized abilities are the product of the exercise of fluid abilities in the past, a moderately strong correlation between both types of abilities is generally found. Then, the first purpose of the current project was to examine the role of fluid abilities in the relation between openness to experience and crystallized abilities. It aimed at determining whether the relation of openness to crystallized abilities was still significant after controlling for the specific contribution of fluid intelligence to crystallized abilities; or conversely, whether this relation was explained by the relation of openness to fluid intelligence. The second purpose was to determine if the relation of openness to experience to both fluid and crystallized abilities varied as a function of age. The possibility that openness to experience differentially contributes to the variance in fluid and crystallized abilities as a function of age was examined. One hundred and sixty-four participants, aged 18 to 96, completed the openness to experience scale (French version of the IPIP, Goldberg, 1999. Personality psychology in Europe), in addition to several tests of fluid and crystallized abilities. After controlling for the variance associated with fluid abilities in crystallized abilities, Openness to experience was not related to crystallized abilities anymore. Moreover, the contribution of the personality trait of Openness to the variation in fluid and crystallized intelligences was similar at different ages in adulthood. Several possible interpretations and their respective implications are discussed. First, people more open may exercise fluid abilities more than people who are less open, and then increase the efficiency of these abilities. Second, fluid abilities may influence the development of the personality trait of openness to experience, that is people's tendency to seek out for novelty and curiosity. And third, the openness to experience scale may only reflect people's self-assessments of their abilities, such as a self-assessed intelligence construct. In any case, our results strongly suggest that the openness-cognition relation reflects something different from a relation between activity and knowledge acquisition.     

Schémas cognitifs, croyances addictives et défenses dans la consommation et l’addiction au cannabis de jeunes adultes

Theoretical background

Integrating the cognitive approaches based on the model of Beck et al. (1993) information treatment, the Young (1994) model of maladapted schemas, the integrative approach of Plutchik (1995) and the clinical approach based on defense mechanisms (Bond, 1995), this study aimed at investigating: (a) the role of the hyperactivated maladapted schemas, (b) the addictive beliefs, (c) the suractivation of the conscious derives of defensive mechanisms and (d) the relationships between these cognitive and defensive variables, in young people's cannabis intensity addiction.

Method

Forty-four young adults, 25 females and 19 males, have completed a self-reported questionnaire estimating: (a) the intensity of cannabis addiction (Décamps et al., 2008), (b) the Rusinek (2006) adaptation of Young's maladapted schemas and (c) the questionnaire of addictive beliefs of Tison and Hautekeete (1998) and the defensive styles questionnaire of Bond et al. (1983) and Bond (1995). Non-parametric statistical analysis has been conducted on three subject's groups (“non-users”, “users non addicted”, “users-addicted”) to test the implications and the links between hypothesized psychological factors (e.g., schemas, beliefs and defences) in cannabis use intensity.

Results and discussion

The intensity of cannabis addiction is correlated significantly with: (a) an hyperactivation of three maladapted schemas: inadequate autocontrol, dependence and fear of lose the control, (b) a hyperactivation of permissive, anticipatory and relief oriented beliefs and (c) a higher activation of the defence “sublimation” and a lower activation of the “displacement”. “sublimation” is correlated with the global activation of 13 schemas that are correlated with the positive relief-oriented beliefs, which are correlated with the “displacement” defence, which is correlated with the anticipatory beliefs. The results showed that the permissive beliefs have the power to differentiate the “non-consumption”, the “consumption without addiction” and “the addiction” to cannabis. Our interpretation displays that greater attention to the dysfunctional beliefs will be required in future researches and should be essential targets in cognitive therapy of this substance use disorder.     

Impact des contraintes linguistiques et cognitives sur l’acquisition de l’accord en genre de l’adjectif en français écrit

The aim of this research is to show the impact of linguistic (the feminine inflexion was audible or not) and cognitive (the complexity of the task in which the agreement is realized) factors about the acquisition and the use of adjectival gender inflexions in written French. In this perspective, we compared the production of the mark of the agreement in three tasks not mobilizing the same levels of linguistic treatment: transcribe sentences under dictation, recall sentences presented orally, and produce two sentences ending with an adjective from a syntactical priming. The results show that the systematic application of the adjectival agreement in gender is not totally mastered at the end of primary. Besides, the use of the adjectival gender inflexions is more difficult when the written inflexion is mute. Finally, the children forgot more the gender inflexion in written production task than in a dictate or recall task. These results are interpreted within the framework of a functional approach of language production.     

Stimulation cognitive chez les personnes âgées : effets d’une méthode de stimulation cognitive par les jeux sur les fonctions cognitives et l’estime de soi

The purpose of this study was to examine the effects of a cognitive stimulation program with games on scores to cognitive tests (processing speed, mental flexibility, working memory, inhibition) and how this program can benefit to a psycho-affective measure, self-esteem in older adults. Forty-eight participants over 60 years old took part in the experiment. They were divided into two groups: 1 group followed a program of cognitive stimulation using leisure activities with games and 1 control group in which people gathered every week. There were 8 sessions of cognitive stimulation using leisure activities like games, one-hour session a week. Measures have focused on speed of processing and executive functions (shifting, updating and inhibition). They have been evaluated before and after the training program. Results show that the cognitive stimulation program using leisure activities with games is effective on speed of processing, memory span, inhibition and self-esteem but shows no benefits on shifting and updating. These results indicate that it seems to be possible to enhance cognitive resources, inhibition and self-esteem using leisure activities with games as a tool for cognitive stimulation.     

Attachement père-cadet et qualité des relations fraternelles cadet-aîné

The aim of this study is to establish a link between the father-child attachment and the quality of the sibling relationships for school-age children, by taking into account the theoretical and methodological evolution of this specific attachment. Fifty-seven fathers answered the Questionnaire of Opening up to the World [Défi jeunesse, 8 (2002) 6–12], which defines the father-child attachment (or activation) on two axes: the stimulation (social, cognitive and emotional) and the paternal control exercised over the child. The Questionnaire “Sibling Relationships in Young Children” [Troupel, O., 2006. Attachement fraternel, styles de relations et des interactions de tutelle au sein des fratries de jeunes enfants : effet modulateur de la représentation des relations fraternelles de l’aîné. Thèse de doctorat nouveau régime, université de Toulouse–Le-Mirail] gives insight into the quality of sibships. Children, with a secure attachment to their father, demonstrate a higher level of cooperation with their elder sibling than the other children, in particular those which receive excessive control and little stimulation from their fathers. The hypothesis that the stimulation of the second-born child by the father on the peer side is directly linked to the quality of the sibships is not confirmed. Other results on father-child attachment and sibships are discussed.     

Cross-Sectional and Longitudinal Associations between Leisure Time Physical Activity,Mental Well-Being and Subjective Health in Middle Adulthood

Previous studies have shown that participation in leisure time physical activity is related to better mental well-being and subjective health. However, the associations between different types of leisure time physical activities and different dimensions of mental well-being have rarely been studied. In addition, longitudinal research, analyzing possible causal relations between these variables, is lacking. To investigate these research questions, data gathered at ages 42 and 50 (present N = 303) for the Finnish Jyväskylä Longitudinal Study of Personality and Social Development were used. Physical activity was assessed as frequency of participation at ages 42 and 50, and at age 50 also as frequency of participation in different types of physical activities. Mental well-being was captured by emotional, psychological and social well-being and subjective health by self-rated health and symptoms. Cross-sectionally, different types of physical activities were related to different dimensions of well-being. Walking had positive associations with psychological and social well-being, rambling in nature with emotional and social well-being, and endurance training with subjective health. Rambling in nature was also positively related to subjective health but only among men. Longitudinally, mental well-being predicted later participation in leisure-time physical activity, whereas no longitudinal associations between subjective health and physical activity were found. The results suggest that leisure time physical activities are related to current mental well-being and subjective health in midlife. Across time, good mental well-being seems to be a resource promoting engagement in physical activity.

     

EMOVAL : évaluation automatique de la valence et de l’activation émotionnelles des textes à l’aide d’une méta-norme de 5656 mots-racines

EMOVAL: automatic evaluation the emotional valence and arousal of texts using a 5656 root-words metanorm. EMOVAL is an emotional valence and arousal analysis model of texts. EMOVAL draws from linguistic tradition the hypothesis that every word has a denotative aspect (“meaning”) and a connotative aspect (“affective halo”). It uses a meta-analysis of seven French norms and one English norm with the objective to characterize the emotional valence of texts, paragraphs, or sentences in a pleasant or unpleasant way. The meta-analysis indicates that the seven French norms data are highly correlated in between (0.82 to 0.99), and highly correlated with the Affectiv Norm for English Words (Bradley et Lang, 1999) (0.81 to 0.97). Arousal values taken from Affective Norm for English Words (ANEW) (Bradley et Lang, 1999) and the Leleu (1987) norm are significately correlated (0.55). The metanorm has 5656 words (nouns, verbs, adjectives, adverbs) characterized in valence (−1 to +1), and 3265 words characterized in arousal. These items are used by EMOVAL for valence judgments of texts. Two types of texts are proposed: the evaluation of the whole (702) or of extracts (110) of a corpus of sentences judged in a seven-point scale (−3 very unpleasant to +3 very pleasant) (Bestgen et al., 2004), and of 12 texts positively valenced (happiness and good surprise) and negatively valenced (fear, anger, disgust, sadness, and bad surprise). These two types of tests confirm the psychological pertinence of EMOVAL. Limits regarding the arousal dimension are discussed. The metanorm presented in this article can be obtained from the authors.     

Processus et subjectivité dans l’addiction

Addictive behaviors point out difficulties in definition and conceptualization. Emotion in its different forms is one of the most important phenomenon in the dynamic of addictions. We question the nature of the act, its economical status and its adaptative value. Moreover, we question the individual vulnerability and behavior's effects. The most important difficulty is to propose a general model of addiction, which can put together and explain the different forms of addictive behaviours. Those have to describe behaviour and its relationships with the individual's functioning, like subjectivity. We tend to propose in this paper such a model and insist on a particular economical system in the addiction.     

Cognitive costs of encoding novel natural activities: Can “learning by doing” be distracting and deceptive?

Findings from action memory research suggest that the enactment of simple actions and naturalistic activities results in similar memory performance to that from their observation. However, little is known about potential differences between the conditions during the encoding of the to-be-studied actions and activities. We analysed the cognitive costs of encoding two novel naturalistic activities studied via enactment or via observation in four experiments. In addition to memory performance, we measured objective cognitive costs with a secondary task and subjective cognitive costs with repeated ratings of mental effort and estimates of general activity difficulty. Memory performance was comparable across study conditions throughout all experiments. The enactment of activities repeatedly resulted in slower reaction times in the secondary task than did observation, suggesting higher objective costs. In contrast, subjective costs were rated lower after enactment than after observation. Findings from a pantomimic enactment condition suggested that the low ratings of subjective costs after enactment represent a misinterpretation of task demands. Our findings imply that the widespread belief about “learning by doing” as an easy way of learning does not stem from an actual advantage in memory performance, but rather from continuous feedback about one's performance resulting from enactment.     

Age and flexible thinking: an experimental demonstration of the beneficial effects of increased cognitively stimulating activity on fluid intelligence in healthy older adults

The disuse hypothesis of cognitive aging attributes decrements in fluid intelligence in older adults to reduced cognitively stimulating activity. This study experimentally tested the hypothesis that a period of increased mentally stimulating activities thus would enhance older adults' fluid intelligence performance. Participants (N=44, mean age 67.82) were administered pre- and post-test measures, including the fluid intelligence measure, Cattell's Culture Fair (CCF) test. Experimental participants engaged in diverse, novel, mentally stimulating activities for 10-12 weeks and were compared to a control condition. Results supported the hypothesis; the experimental group showed greater pre- to post-CCF gain than did controls (effect size d=0.56), with a similar gain on a spatial-perceptual task (WAIS-R Blocks). Even brief periods of increased cognitive stimulation can improve older adults' problem solving and flexible thinking.     

Youth belonging and cognitive engagement in organized activities: A large-scale field study

Numerous studies of organized activities have found that participation is associated with a range of positive outcomes; however, findings from recent randomized trials have been more mixed. Understanding youth's psychological experiences of program involvement – their cognitive and emotional reaction to and participation in activities – may be key to understanding the influence of organized activities. Hierarchical linear modeling was used to investigate correlates of youth belonging and cognitive engagement in a sample of 1160 youth in 123 program offerings in 66 sites. Results revealed that intensity (frequency) of exposure positively predicted belonging and cognitive engagement; however, duration was negatively associated with cognitive engagement. The staff practice of providing a welcoming atmosphere predicted belonging; whereas provision of active skill-building predicted cognitive engagement. These relations were found to vary across content type.     

Working memory and fluid intelligence as predictors of work engagement—Testing preliminary models

This study aimed to investigate the relationships between working memory capacity, fluid intelligence (Gf), and work engagement within the framework of the job demands–resources theory. Multioccupational employees (N = 175 in Study 1 and N = 383 in Study 2) completed sets of Gf, complex span, and n‐back tests, along with job resources and work engagement surveys. Structural equation modeling with latent variables and bootstrapping procedures revealed that complex span was indirectly positively related to work engagement via job resources, and n‐back was indirectly positively related to work engagement via job complexity. Moreover, the one common factor g composed of Gf, n‐back, and complex span was positively indirectly related to work engagement via job resources and job complexity. These results highlight that the cognitive capacities of employees should be given greater consideration as cognitive personal resources in models aimed at accounting for employee work engagement.     

The Job Demands–Resources model: An analysis of additive and joint effects of demands and resources

The present study investigated the additive, synergistic, and moderating effects of job demands and job resources on well-being (burnout and work engagement) and organizational outcomes, as specified by the Job Demands–Resources (JD-R) model. A survey was conducted among two Chinese samples: 625 blue collar workers and 761 health professionals. A series of multi-group structural equation modeling analyses supported the two processes proposed by the JD-R model: (1) the stress process that originates from job demands and leads, via burnout, to negative organizational outcomes (turnover intention and low organization commitment); and (2) the motivational process that originates from job resources and leads, via work engagement, to positive organizational outcomes. In contrast to moderating effects, synergistic effects of job demands and job resources on burnout and work engagement were found in both samples. However, after controlling for additive effects of job demands and job resources, these synergistic effects largely disappeared. In conclusion, the hypothesized additive effects of the JD-R model were found but the evidence for additional synergistic and moderating effects was weak.     

The Role of Leisure Interest and Engagement for Subjective Well-Being

During the last decades, the association between leisure engagement and subjective well-being (SWB) has been examined. Yet, the role of the interest in specific leisure activities for SWB has been neglected. Thus, we examined whether the pure leisure engagement or the opportunity to realize the longing to pursue a leisure activity is linked to well-being. A sample of 402 participants completed an online survey about interests and the frequency of engagement in diverse leisure activities as well as physical, cognitive, and affective well-being. The study revealed that leisure engagement showed stronger associations with all aspects of well-being than leisure interest per se. More specifically, interest and engagement in social activities and sports showed robust associations with different facets of well-being. Furthermore, a high individual fit between leisure interest and engagement across diverse activities incrementally predicted SWB beyond leisure engagement per se. Analyses of nonlinear associations indicated that too much leisure engagement was associated with lower levels of SWB, but high interest in leisure activities buffered this effect. Thus, the intrinsic motivation to leisure activities may play an important role for well-being in addition to the sheer leisure engagement.     

Age and Flexible Thinking: An Experimental Demonstration of the Beneficial Effects of Increased Cognitively Stimulating Activity on Fluid Intelligence in Healthy Older Adults

ABSTRACT

The disuse hypothesis of cognitive aging attributes decrements in fluid intelligence in older adults to reduced cognitively stimulating activity. This study experimentally tested the hypothesis that a period of increased mentally stimulating activities thus would enhance older adults' fluid intelligence performance. Participants (N?=?44, mean age 67.82) were administered pre- and post-test measures, including the fluid intelligence measure, Cattell's Culture Fair (CCF) test. Experimental participants engaged in diverse, novel, mentally stimulating activities for 10–12 weeks and were compared to a control condition. Results supported the hypothesis; the experimental group showed greater pre- to post-CCF gain than did controls (effect size d?=?0.56), with a similar gain on a spatial-perceptual task (WAIS-R Blocks). Even brief periods of increased cognitive stimulation can improve older adults' problem solving and flexible thinking.     

体感游戏促进儿童的执行功能：运动强度和认知参与的作用

为了考察体感游戏促进儿童执行功能的作用机制, 采用2(运动强度：高/低) × 2(认知参与：高/低) × 3(测量时间：前测、一次性训练后测、长期训练后测)的三因素混合实验设计, 对122名4~6岁儿童进行6周(每周3次)的体感游戏训练。结果发现：在一次性训练中, 体感游戏中的运动强度而不是认知参与显著促进儿童执行功能, 尤其是工作记忆; 在长期干预中, 体感游戏中的运动强度和认知参与都显著促进儿童执行功能, 且认知参与的作用大于运动强度。这一结果不但验证了体感游戏对儿童执行功能的益处, 并且阐明了体感游戏中的哪些特征能对儿童执行功能具有短期的和长期的效果。     

Transmission of reduction‐oriented crafting among colleagues: A diary study on the moderating role of working conditions

Zooming into reduction‐oriented job crafting among employees, next to minimizing demands (i.e., making a job less strenuous), we introduced optimizing demands (i.e., simplifying the job and making work processes more efficient) and suggested that optimizing demands should be positively related to work engagement, whereas minimizing demands negatively related to work engagement. Moreover, we suggested that both forms of reduction‐oriented crafting can be transferred among colleagues, and this will particularly occur in jobs that are high on demands (workload and emotional demands), low on resources (autonomy), and when the colleagues have a high‐quality relationship. We examined these hypotheses among 65 dyads of employees who filled in a general questionnaire and a diary for three working days. Multilevel analyses supported the transmission of both job crafting dimensions among colleagues. Moreover, there is more transmission of minimizing demands among colleagues when workload and emotional demands are high and autonomy is low. Additionally, optimizing demands was transmitted among colleagues when autonomy was low and quality of relationship with colleague was high. Optimizing demands was positively related to work engagement, whereas minimizing demands was unrelated to work engagement. These findings imply that optimizing demands is a favourable behaviour and can be transmitted among colleagues under specific conditions.

Practitioner points

• Working smarter is related to higher work engagement
• Employees model their colleague's proactive behaviour
• Unfavourable working conditions stimulate modelling behaviour of colleagues

     

Mental workload and visual impairment: differences between pupil, blink, and subjective rating

This research has two aims: (a) To study the concurrent validity of three measures of mental workload, NASA TLX rating scale, pupil dilation and blink rate, testing the hypothesis that they will provide convergent results using a single-task, and dissociative results for dual-task; and (b) To analyse their capability to predict visual search impairment. These three measures were analyzed in the same cognitive tasks in single-task and dual-task (cognitive task and visual search) conditions in a within-subjects experiment with twenty-nine participants. Mental workload measures showed concurrent validity under single-task condition, but a complex pattern of results arose in the dual-task condition: it is suggested that NASA TLX would be a subjective addition of the rating of each task; pupil dilation would measure the average arousal underlying the cognitive tasks; and the blink rate would produce opposite effects: whereas mental workload of cognitive tasks would increase blink rate, visual demand would inhibit it. All three measures were good predictors of visual impairment. The soundness of these measures is discussed with regard to the applied field of driving and other activities.     

Driving in dangerous territory: Complexity and road-characteristics influence attentional demand

Car driving related attentional demands fluctuate according to route complexity and are found to be highly associated with motor-vehicle collisions (MVCs). The purpose of the current study was to explore the inherent attentional demands of scenarios that approximate common crash configurations. Sixty drivers completed a series of 20 simulated driving scenarios incorporating either rear-end or crossing path situations. For each scenario, the complexity of the driving environment was systematically manipulated in terms of vehicle handling and information processing elements. The attentional demands of each scenario were assessed by means of a peripheral detection task (PDT) as well as through a subjective measure of overall difficulty. Our results showed a reduction in PDT performance at intersections where information processing is increased as well as when handling maneuvers behind a lead vehicle were required. The results point to the appropriateness of the PDT as a sensitive measure of cognitive workload. The implications of these findings for future research and safety initiatives are discussed.